15-Minute Lentil Veggie Curry

Name: 15-Minute Lentil Veggie Curry
Cuisine: Asian, Indian
Ingredients: 2/3 cup dried green, brown, or French lentils; 2 tablespoons olive oil; 1 small yellow onion, diced (about 1 cup); 4 garlic cloves, minced; 1-inch piece ginger, grated; 1 tablespoon curry powder; 2 teaspoons garam masala; 1 teaspoon ground cumin; ½ teaspoon ground coriander; ½ teaspoon sweet paprika; ½ teaspoon turmeric; 1 14-ounce can coconut milk; 1 cup vegetable broth plus more as needed; ½ cup tomato puree or strained tomatoes (tomato passata); ¾ pound sweet potato (about 2 small), peeled, cut into 1-inch pieces; 2 packed cups baby spinach; Fresh lime juice to taste; Salt to taste; ¼ cup chopped cilantro, for garnish