Slow Cooker Mediterranean Lentil Stew Recipe

Ingredients

• 5 cups water
• 2 1/2 cubes vegetable bouillon, or more to taste
• 2 cups dry lentils
• 5 small carrots, peeled and diced
• 2 medium potatoes, peeled and diced
• 3 teaspoons ground cumin, or to taste
• 1 teaspoon ground coriander
• 1 tablespoon olive oil
• 1 small onion, diced
• 4 cloves garlic, minced
• 1/2 (6 ounce) can tomato paste, or to taste
• 1/2 teaspoon sea salt, or to taste
• 1/2 teaspoon freshly ground black pepper, or to taste
• 1/2 (8 ounce) package fresh spinach, torn