Pasta with Lentils, Onions, and Spinach

• 1/3 cup olive oil
• 3 large onions, thinly sliced (7 cups)
• 2 chopped garlic cloves
• 1/4 tsp salt
• 1/8 tsp pepper
• 1 bay leaf
• 1 cup lentils
• 1 lb pasta
• 2 (5oz) bags baby spinach
• ~3/4 cut finely grated Parmigiano-Reggiano
• some italian sausage

1. in big pot, fry sausage, then remove & reserve. Slice.
2. Cook onions, garlic, salt, pepper, and bay leaf, on medium-low until onions are tender, ~20m+. Remove bay leaf.
3. In small pot, cover lentils with 1" of water and boil until most water is absorbed, ~20m, then add salt & pepper and let stand, covered.
4. Boil pasta, and reserve 1 cup cooking water before draining.
5. Toss together pasta, onion, lentils, and sausage. Toss in spinach with reserved water. Toss in cheese. Add salt & pepper.