Preheat oven to 400 degrees. Line a baking sheet with foil and spray lightly with canola spray.
In a large bowl, toss the wings with 2 teaspoons of oil and a large pinch of salt and a large pinch of pepper. Spread chicken wings out onto the baking sheet. Bake for 20 minutes, then flip chicken wings over and bake for 15-20 minutes, or until fully cooked and crispy brown.
In sauce pan, heat 2 teaspoons of vegetable oil over medium heat and add onion. Cook until the onions are browned, but not golden, then add the garlic and cook until fragrant, about 30 seconds. Add ketchup, sriracha hot sauce, vinegar, fish sauce and cumin.
Stir well and let simmer for about 3 minutes. Taste and season with salt as needed. Remove from heat and set aside. After chicken wings have finished baking, toss wings in sauce. Serve warm.