Summer Pesto Penne

Heat large covered saucepot salted water to boiling on high. Meanwhile, make pesto: In food processor, pulse 1 cup packed parsley leaves; 1/2 cup packed mint leaves; 1/3 cup walnut halves; 2 tablespoons lemon juice; 2 cloves garlic, smashed; 1/2 teaspoon salt; and 1/4 teaspoon pepper until almost smooth. With motor running, slowly add 1/3 cup olive oil, then 1/4 cup water until smooth. Cook 1 pound penne as label directs, but 4 minutes before penne is done cooking, add asparagus. Then, 2 minutes before penne is done, add 2 cups frozen peas. Drain. Toss pasta mixture with pesto and 1/4 teaspoon salt. Top with 1/3 cup ricotta cheese.