Spicy Marinated Shrimp

Thaw frozen shrimp.

In bowl, combine vinegar, lemon juice, salt, mustard and pepper; set aside.

In medium skillet, cook shrimp, half of the onion slices and the garlic in hot oil over medium-high heat 4 to 5 minutes or just until shrimp are done, stirring occasionally.

Remove onion and garlic with slotted spoon; discard.

Add shrimp and remaining oil to vinegar mixture in bowl along with remaining onion and jalapeño.

Cover and chill several hours or overnight, stirring occasionally.