Balsamic Glazed Pork

INGREDIENTS: One package of four-cheese ravioli 3 tbsp olive oil 4 tbsp butter 1 lb thin asparagus (cut ends & cut them into 2-inch pieces) 1 package of halved grape tomatoes 3 cloves garlic minced 1 tbsp balsamic vinegar 2/3 cup chopped & toasted walnuts (optional) 1/4 cup minced