Roasted Garlic Tomato Bisque with Grilled Gruyère Sourdough Dippers Step-by-step instructions

Before you start

Before starting, heat the oven for roasting the garlic. Prep the onion by chopping it finely, and measure out the olive oil, butter, heavy cream, vegetable broth, and basil. Shred the Gruyère cheese if it isn't already shredded.

Cut the sourdough bread into thick slices if needed. Have a large pot, immersion blender (or countertop blender), and a large skillet ready. Roasting the garlic takes about 30 minutes, so you can prepare the other ingredients while it cooks.

Instructions

Build the Bisque Base

1. 1Roast the garlic and start the base
   Heat the oven to 400°F (200°C). Slice the top off the head of garlic to expose the cloves, drizzle with a little olive oil, wrap in foil, and roast for 30–35 minutes until soft and caramelized. While the garlic roasts, heat the olive oil and butter in a large pot over medium heat. Add the chopped onion and cook, stirring occasionally, for 5–7 minutes until translucent and just starting to brown.
   Look for The onion is soft and golden, and the garlic is tender when pierced with a knife.
   Tip Roast the garlic ahead of time to save prep; keep it wrapped in foil until ready to use.
2. 2Add tomatoes and broth
   Once the garlic is roasted, let it cool slightly, then squeeze the cloves from the skins into the pot with the onions. Add the whole peeled San Marzano tomatoes with their juices and the vegetable broth. Stir to combine, breaking up the tomatoes with a spoon. Bring the mixture to a simmer and cook for 20 minutes, allowing the flavors to meld and the tomatoes to soften.
   Look for The liquid is bubbling gently and the tomatoes have broken down into a chunky sauce.
   Tip Use the back of a spoon to crush the tomatoes for a smoother texture before blending.
3. 3Blend until silky
   Remove the pot from the heat. Using an immersion blender, blend the soup until completely smooth. Alternatively, carefully transfer the mixture to a countertop blender in batches and blend until silky. Return the pureed soup to the pot.
   Look for The soup is velvety and uniform with no visible chunks.
   Tip If using a countertop blender, vent the lid slightly to allow steam to escape.

At the end of this phase, the garlic is roasted and soft, and the onions are translucent and fragrant. The tomatoes and broth are simmering, and the kitchen smells sweet and savory. The soup is a chunky, rustic mixture that will soon become smooth.

Blend and Prepare Dippers

4. 4Swirl in the cream and basil
   Place the pot back over low heat. Pour in the heavy cream and stir until fully incorporated. Add the chopped fresh basil and stir gently. Let the bisque warm through for 2–3 minutes, but do not let it boil. Season with salt and pepper to taste.
   Look for The soup is a rich, velvety orange-red and smells fragrantly of basil.
   Tip Taste and adjust seasoning; the soup should be well-seasoned but not salty.
5. 5Assemble the grilled cheese sandwiches
   Heat a large skillet or griddle over medium heat. Butter one side of each sourdough slice. Place four slices buttered-side down on a plate. Divide the shredded Gruyère cheese evenly among them. Top with the remaining sourdough slices, buttered-side up.
   Look for The sandwiches are assembled with cheese between the bread slices.
   Tip Use a generous amount of cheese for the best melt and flavor.
6. 6Grill until golden and melted
   Carefully place the sandwiches in the hot skillet. Cook for 3–4 minutes per side, pressing gently with a spatula, until the bread is deep golden brown and crispy and the cheese is fully melted. Adjust the heat as needed to prevent burning.
   Look for The bread is golden and crunchy, and the cheese is oozing out slightly.
   Tip Cook in batches if needed to avoid overcrowding the pan.

The soup is now silky and creamy, with the cream and basil swirled in. The grilled cheese sandwiches are assembled and cooking in the skillet, turning golden and releasing the aroma of toasted bread and melted cheese. The cheese is bubbling and the bread is crisp.

Slice and Serve

7. 7Slice into dippers
   Transfer the grilled sandwiches to a cutting board. Let them rest for 1 minute, then slice each sandwich into 1-inch-wide strips to create dippers.
   Look for The dippers are neatly cut and the cheese is still molten inside.
   Tip Use a serrated knife for clean cuts without squishing the bread.
8. 8Garnish and serve
   Ladle the hot bisque into bowls. Add a swirl of extra cream on top if desired and sprinkle with a few fresh basil leaves. Serve immediately with the warm Gruyère sourdough dippers alongside for dipping.
   Look for The bisque is steaming and the dippers are crispy and inviting.
   Tip Keep the dippers warm in a low oven if serving later.

The dippers are sliced into neat strips, and the bisque is ladled into bowls. The final dish is vibrant and inviting, with a swirl of cream and fresh basil on top. The dippers are warm and crispy, perfect for dunking into the hot bisque.

Common mistakes

Avoid boiling the soup after adding the cream, as it can cause the cream to separate and make the bisque grainy. When blending hot soup in a countertop blender, always vent the lid and start on low to prevent splattering.

Don't overcrowd the skillet when grilling the sandwiches; cook them in batches to ensure even browning and crispness. Also, resist the urge to press down too hard on the sandwiches, which can squeeze out the cheese. Use medium heat to allow the cheese to melt fully without burning the bread.

How to tell it’s done

The bisque is done when it's smooth, velvety, and heated through, with the cream fully incorporated. It should have a rich, orange-red color and a fragrant aroma of roasted garlic and basil.

The dippers are done when the bread is golden brown and crispy on both sides, and the cheese is fully melted and slightly oozing.

If you press the sandwich gently, it should feel firm and crunchy. For the bisque, if you're using a thermometer, it should be at least 165°F (74°C) when served hot.