Tortellini salad with roasted asparagus pesto

Spinach or ricotta filled tortellini
2 tablespoons olive oil
1 pound asparagus
Freshly ground black pepper
One teaspoon minced garlic
1/4 cup pine nuts, or none of your choice
3/4 cup Parmesan cheese for sharp cheese of your choice
1 tablespoon lemon juice
One head lettuce, your choice