Heat toaster oven to broil. Line the toaster oven tray with foil.
Stir together the garlic, shallot, parsley and soft butter.
Season the shrimp on both sides with salt and pepper and generously brush each side with garlic butter.
Place shrimp on the foil-lined tray and bake for 3 to 5 minutes, depending on size, until the shrimp just turns opaque. Finish with fresh-squeezed lemon juice.