Ingredients
- 1 tablespoon olive oil
- 1 yellow onion , diced
- 2 teaspoons salt , divided, plus more to taste
- 16 ounces cremini or button mushrooms , thinly sliced
- 3 cloves garlic , minced
- 1 quart unsalted chicken stock or broth
- 2 cups water
- 5 sprigs fresh thyme, or 3/4 teaspoon dried thyme
- 1 bay leaf
- 1 pound boneless, skinless chicken breasts or thighs
- 8 ounces dry lasagna noodles
- 10 ounces baby spinach
- 1 cup ( 4 ounces ) freshly grated Parmesan cheese
- 2 cups whole milk
- Ricotta , to serve
- Freshly ground black pepper , to taste
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