Preheat the oven to 190C/375F.
Melt butter in a large oven-proof skillet. Add chopped onions and saute for 5 minutes.
3 tablespoon butter, 1 medium white onion
Mix in spinach and cook for 2-3 minutes. Transfer into a separate plate, add a few tablespoons of olive oil into the pan. Add chicken into the pan.
olive oil, 90 g 3 oz spinach, 600 g 21 oz ground chicken
Cook chicken, breaking it up with a fork, for around 10 minutes. Season with salt and pepper, mix in garlic, spinach and flour.
3 garlic cloves, 3 tablespoon flour
Pour in chicken stock and milk. Add basil. Stir well, bring to a boil.
1 ½ cups chicken stock, 2 ½ cups milk, 11/4 cup basil leaves
Break lasagna sheets into smaller pieces, add pieces into the boiling sauce. From this point make sure to stir pasta all the way through the cooking time (around 10 minutes) to prevent it from sticking to the pan or each other.
200 g 7 oz lasagna sheets
Top pasta with shredded cheese and bake for 15 minutes.
1 cup mozzarella