Bell peppers: 200 g (2 medium), Green lentils: 50 g (1/4 cup, uncooked), Mushrooms: 100 g (1 cup, chopped), Spinach: 60 g (2 cups), Onion: 50 g (1/2 medium, diced), Garlic: 6 g (2 cloves, minced), Tomato sauce: 60 g (1/4 cup), Feta cheese: 30 g (2 tbsp, crumbled), Olive oil: 10 ml (2 tsp), Italian herbs: 2 g (1 tsp), Nutritional yeast: 5 g (1 tbsp), Black pepper: To taste, Salt: To taste, Lemon zest: 1/2 tsp (optional, for brightness), Fresh parsley: 5 g (1 tbsp, chopped, optional for garnish)