Melt 1/2 stick butter in medium size bowl. Add olive oil. Squeeze lemon juice into mix.
Add grey poupon mustard, add minced fresh basil. Add minced cloves of garlic, add salt and pepper. Whip mixture and marinate cleaned shrimp for 1 hour. Place marinated shrimp on skewers or a pizza pan with holes in it and BBQ until shrimp is pink and done. If you use the pizza pan you have to turn them when the one side turns pink.