Get started: Preheat your oven to 350 degree F. Grease a muffin tin or line with muffin cups.
Prepare muffins: In a large bowl, combine drained tuna, cottage cheese, almond flour, parmesan cheese, red onion, Dijon mustard, garlic powder, jalapeno, chives, and salt and pepper. Stir until well combined.
Fill muffin cups: Use an ice cream scooper or large spoon to spoon the mixture into muffin cups. Fill each cup to about ¾ full. If desired, sprinkle a bit of grated parmesan on the top of each muffin.
Bake and serve: Bake for about 20 to 25 minutes until the tops are lightly golden. Allow tuna muffins to cool for several minutes before removing from tin. Top with more chives as desired. Serve immediately or store in fridge.