1 (8 ounce) package penne pasta
1/4 pound uncooked medium shrimp, peeled and deveined (optional)
1 avocado, peeled and pitted
1/2 lemon, juiced
1/2 cup fresh basil, or more to taste
2 tablespoons grated Romano cheese
2 cloves garlic
salt and ground black pepper to taste
1/4 cup olive oil, or as needed
1/4 cup diced cherry tomatoes, or more to taste (optional)
2 tablespoons grated Romano cheese, or more to taste
salt and ground black pepper to taste