Paleo-ish Salmon Burgers Recipe

1 (14 ounce) can salmon

drained and flaked

1 cup gluten-free bread crumbs

½ cup chopped onions

2 eggs

beaten

3 tablespoons mayonnaise

1 tablespoon chopped fresh parsley

2 teaspoons lemon juice

¼ teaspoon garlic salt

1 tablespoon olive oil

or more as needed