In a large pot cook the pasta according to the directions. In a saute pan melt the butter and olive oil. Add the garlic and cook for a minute. Add the shrimp in a single layer. Cook for 2 minutes or until just turning pink. Turn the shrimp and cook for another minute. Add parsley, dill and lemon slices. Add salt and pepper to taste. Add pasta water if the sauce is to thick. Drain the spaghetti and pour into the shrimp or in a bowl and add the shrimp and toss to combine. Enjoy with garlic bread. Bon Appetit.