Easy pesto lasagne

Name: Easy pesto lasagne
Prep time: 10 min
Cook time: 45 min
Total time: 55 min
Cuisine: Italian
Ingredients: 190g jar pesto; 500g tub mascarpone; 200g bag spinach , roughly chopped; 250g frozen pea; small pack basil , leaves chopped, and a few leaves reserved to finish; small pack mint , leaves chopped; 12 fresh lasagne sheets; splash of milk; 85g parmesan , grated (or vegetarian alternative); 50g pine nuts; green salad , to serve (optional)