Dinner · Part 1 of 3: Ingredients
Slow Cooker Tomato Basil Red Lentils for an Easy Weeknight Dinner

- Prep
- Cook
- Total
- Serves
- 4
Master the art of hands-off cooking with this simple, reliable red lentil stew. Designed for those who value efficiency, this recipe requires minimal preparation while delivering a deeply satisfying, plant-based meal.
By using a slow cooker to gently simmer lentils with vibrant tomato coulis and aromatic dried basil, the flavors meld together perfectly over several hours. Experience how straightforward ingredients can be transformed into a sophisticated dish that warms the soul and simplifies the dinner routine for any night of the week.
This slow cooker tomato basil red lentil stew is the ultimate answer to busy days. It relies on the steady, gentle heat of a slow cooker to transform basic pantry items into a thick, comforting meal. Because red lentils break down during the cooking process, they create a natural, creamy texture that pairs beautifully with the acidity and sweetness of tomato coulis.
This recipe is intentionally simple, focusing on the quality of the base ingredients to provide a balanced and flavorful result without the need for complex techniques or constant monitoring while the meal cooks.
Ingredients
Main Ingredients
- 1 cup dried red lentils, rinsed
- 2 carrots, diced
- 1 yellow onion, finely diced
- 1 tbsp dried basil
- 2 cups tomato coulis
Why this recipe works
The slow cooking method is ideal for red lentils, which soften and release their starches, thickening the tomato sauce naturally. This creates a dense, stew-like consistency that feels hearty and substantial without needing heavy additions. The low and slow environment ensures that the carrots and onions become perfectly tender without losing their structural integrity, allowing them to provide texture throughout the dish.
Using tomato coulis as the primary liquid provides a concentrated tomato flavor that would take much longer to achieve with fresh tomatoes. The dried basil rehydrates during the long cooking process, infusing the entire dish with its sweet, herbal notes.
This approach minimizes the number of steps and dishes required, making it an efficient choice for those who need a meal ready with very little effort or active time in the kitchen.
Notes and substitutions
Red lentils are the preferred variety for this recipe because they cook down significantly faster than green or brown lentils. If substituting with other varieties, the cooking time will need to be adjusted significantly, and the final texture will be firmer rather than creamy. Ensure the lentils are thoroughly rinsed before adding them to the slow cooker to maintain a clean flavor profile in the final stew.
While a standard slow cooker is the recommended equipment, ensure the vessel is clean and the lid fits tightly to maintain the necessary heat. If the stew appears too dry upon opening, add a small amount of warm water, one tablespoon at a time, until the desired consistency is achieved.
Storing leftovers in an airtight container will help maintain the flavor, as the herbs will continue to infuse the lentils further while refrigerated.
- Tomato coulis: Crushed tomatoes or tomato purée can be used if coulis is unavailable.
- Dried basil: Fresh basil leaves, added at the very end of cooking, provide a brighter flavor profile.
Equipment
- Slow cooker
- Chef's knife
- Cutting board
- Measuring cup
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)