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Dinner · Part 1 of 3: Ingredients

Slow Cooker Green Lentils with Carrots and Wholegrain Mustard

A close-up of a bowl filled with slow-cooked green lentils, carrots, and onions in a savory, glossy mustard broth.
Prep
Cook
Total
Serves
4
Includes 5 min resting

Discover the simplicity of slow-cooked meals with this vibrant, mustard-infused lentil dish. By combining wholesome ingredients in one pot, you create a deeply flavorful and satisfying meal that practically cooks itself while you go about your day.

This hands-off approach transforms basic pantry staples into a sophisticated, aromatic dinner that fills the home with comforting scents. Whether you are a busy professional or simply looking for a reliable, low-maintenance recipe, this dish offers a perfect solution for effortless cooking that does not compromise on depth of flavor or texture.

This recipe focuses on the natural, earthy flavors of green lentils enhanced by the aromatic sweetness of carrots and onions. The addition of wholegrain mustard provides a sophisticated, tangy finish that elevates a simple pantry staple into a memorable dinner experience.

Ideal for busy weeknights, this slow cooker method ensures consistent results without the need for constant supervision, making it an excellent addition to any routine. The gentle heat of the slow cooker allows the ingredients to meld beautifully, creating a dish that is both rustic and refined, perfect for serving on its own or as a hearty side dish for any occasion.

Ingredients

Makes 4 servings · serves 4

Main Ingredients

  • 1 cup green lentils, rinsed
  • 2 medium carrots, sliced
  • 1 medium yellow onion, chopped

Broth Base

  • 1 cube vegetable bouillon cube, crumbled
  • 2 tbsp wholegrain mustard
Contains: mustard

Why this recipe works

The slow cooking method allows the green lentils to maintain their structure while gradually absorbing the savory vegetable broth. This low-and-slow approach ensures that the carrots and onions soften perfectly, releasing their natural sugars to balance the sharp, tangy notes of the mustard. By cooking at a low temperature for an extended period, the lentils achieve a tender consistency without turning into mush, allowing the complex flavors to develop and permeate every single bite of the dish throughout the entire cooking cycle.

Ready to start cooking right away??? Jump to Part 2 ? Step-by-Step Method ?

By combining all ingredients at the start, the flavors meld together over several hours, resulting in a cohesive dish where the mustard permeates every lentil. This method minimizes cleanup and eliminates the need for precooking or sautéing, saving valuable time while maximizing the depth of the final flavor profile.

The slow cooker environment maintains a steady, moist heat that is ideal for legumes, ensuring that the final result is consistently delicious and requires minimal intervention from the cook once the process has been initiated in the kitchen.

Notes and substitutions

Green lentils are chosen for this recipe specifically for their ability to hold their shape during the extended cooking time. If you only have brown lentils, monitor the cooking closely, as they tend to break down faster and may result in a thicker, porridge-like consistency. Always ensure that the lentils are thoroughly rinsed before adding them to the slow cooker to remove any dust or debris, which helps in maintaining the clarity and flavor of the final broth during the long, slow simmering process.

When selecting a slow cooker, ensure it has enough capacity to accommodate the expansion of the lentils as they absorb the liquid. The glass measuring pitcher is recommended for mixing the mustard and liquid to ensure the emulsion is smooth before adding it to the pot.

Using a high-quality vegetable bouillon cube is key to achieving a rich, savory base that supports the tanginess of the mustard. If you prefer a different flavor profile, you can adjust the amount of mustard added to the liquid base to suit your personal preferences.

  • Green lentils: Brown lentils can be used, though they may become softer during the long cooking process.
  • Vegetable bouillon cube: Chicken bouillon cube can be substituted if a non-vegetarian broth is preferred.

Equipment

  • Slow cooker
  • Chef's knife
  • Cutting board
  • Measuring cups
  • Glass measuring pitcher

Coming up in Part 2: the method

  1. Layering the Base · 1 stepAssemble the Ingredients
  2. Adding the Mustard Broth · 1 stepPrepare the Mustard Broth
  3. Final Slow Cooking · 1 stepSlow Cook and Serve

Up next · Part 2 of 3

3 steps · 4 h of cooking · what to look for at each stage

Step-by-step instructions (Part 2)