Easy, Healthy, High-Protein Tuna Sandwich

Drain the two cans of flaked light tuna. In a bowl, combine the drained tuna with the juice from 1 squeezed lemon, 1/3 cup chopped red onions, 1/3 cup chopped celery, 1/3 cup chopped green onions, 2 tablespoons chopped pickled jalapeños (or pickles), and a splash of juice from the jalapeño/pickle jar. Add 2 tablespoons light mayo, 1 teaspoon dijon mustard, 1/2 teaspoon salt, 1/2 teaspoon pepper, and 1/2 teaspoon chili flakes. Mix all ingredients thoroughly. Optionally, you can add 1/2 teaspoon garlic powder. Serve the tuna mixture with lettuce, tomatoes, and toast to make a sandwich, or use it as a topping for salad or pasta.