Creating Shrimp Salad on Croissants is straightforward if you follow these simple steps:

1. Cook the Shrimp: Boil a pot of water and add the peeled and deveined shrimp. Cook for about 3-4 minutes or until the shrimp turns pink. Remove from heat and drain.

2. Chop the Vegetables: While the shrimp is cooking, finely chop the celery and red onion. Set aside.

3. Prepare the Dressing: In a large bowl, combine mayonnaise, Dijon mustard, lemon juice, salt, and pepper. Mix well until smooth.

4. Combine Ingredients: Once the shrimp has cooled, chop it into bite-sized pieces. Add the chopped shrimp, celery, and red onion to the dressing mixture and fold gently until everything is well coated.

5. Assemble the Croissants: Slice the croissants in half horizontally. Place a generous amount of shrimp salad inside each croissant and top with leafy greens.