Delicious Bake Tuna Melt Bites - Cheesy

Ingredients

• 1 (12 oz) can of tuna, drained (340g)
• 1/4 cup mayonnaise (60ml)
• 1/4 cup chopped celery (35g)
• 1/4 cup finely chopped red onion (40g)
• 1 tablespoon Dijon mustard (15g)
• 1/2 teaspoon garlic powder (2g)
• 1/4 teaspoon salt (1.5g)
• 1/4 teaspoon black pepper (1g)
• 1 cup shredded cheddar cheese (100g)
• 1 (8 oz) package refrigerated crescent roll dough (226g)
• 1 egg, beaten (for egg wash)