Gather all ingredients before starting the recipe.
Drain 2 lbs cooked shrimp (26-30) count (2 bags) in a colander for a few minutes before combining with dressing.
Julienne 1 large roasted red pepper into small slices.
Combine 1/2 medium red onion, thinly sliced, 2 tbsp capers, 1 lemon thinly sliced (use mandolin), 1/2 cup olive oil, 1/3 cup red wine vinegar, 1 tsp sugar, 1 tsp kosher salt, 1/2 tsp celery seed, 1 large roasted red pepper, sliced and 1/4 tsp Asian chili sauce. Stir to combine.
Combine dressing with cooked shrimp tossing shrimp in the dressing to make sure that you coat all the shrimp.
Chill overnight in a bowl, stirring occasionally or transfer to a glass flip top jar to store for smaller portions.