Preheat oven to 350 degrees F.
Melt butter in a skillet over medium heat and cook onions, green pepper and garlic until peppers are limp.
Place in mixing bowl and add half and half, mustard and cayenne pepper to sauteed vegetables, mix well.
Add cracker crumbs, mayonnaise, egg, parsley and lemon juice; mix well.
Gently fold in crab meat.
Form into small patties sized to stuff into shrimp; set aside.
Split shrimp down the bottom center to tail, being careful not to cut through.
Stuff each shrimp with crab meat mixture.
Wrap shrimp in bacon and secure with a toothpick.
Place on a baking pan and cook at 350 degrees until bacon is crisp and shrimp are pink, about 15 to 20 minutes.
To serve, arrange 4 shrimp on each plate on a bed of rice, if desired.
Drizzle with Basil Cream Sauce.
Creamy Pesto Sauce:
Heat butter and olive oil in a skillet over medium heat, add onion and cook until lightly browned, about 5 minutes; add garlic and sauté lightly.
Add white wine and reduce by half.
Add half and half and chicken base and reduce by half again.
In a small bowl, combine 1 teaspoon butter and 1 teaspoon flour.
Mash with a fork or fingers until a paste forms (this will be your “roux”).
Add pesto and roux; bring to a simmer and heat until slightly thickened, about 2 to 3 minutes.