To medium mixing bowl, add salsa, mayonnaise, garlic and paprika. Stir to combine. Set aside.
Salmon Patty Preparation
Combine salmon, onions, olive oil, red wine vinegar, bread crumbs, eggs, parsley and spices in bowl of stand mixer. Using paddle attachment, blend for 1 minute.
Shape mixture into patties.
In a large skillet, heat butter over medium heat.
Place patties in heated skillet. Flatten with spatula. Cook patties for 2-3 minutes per side or until golden brown. Drain on paper towel.
To serve, place lettuce and cucumber on pretzel buns. Top with salmon patties and a dollop of Hatch chile aioli.