Over medium to high heat, add butter and 1 tablespoon of olive oil. Add garlic and cook till fragrant. Add shrimp till slightly pink, add corn and cook for another 2 minutes, add scallion, half of the cilantro, salt and pepper to taste
Bring a large pot of water to boil, add some salt. Cook Pasta. Since I am using fresh homemade pasta, this only takes 3-5 minutes. Dry pasta takes longer, cook according to instruction on box.
Cut avocado in two halves, scoop out the avocado and put in food processor. Add lime juice, cilantro, salt, pepper, remaining olive oil, pulse till it forms a paste.
Mix pasta, shrimp, and avocado sauce; and serve