Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.

Spread freshly grated Parmesan cheese evenly across the parchment-lined baking sheet.

Thinly slice your yellow onions to about ⅙ inch thick and lay them over the Parmesan cheese.

Coat each onion slice with avocado oil using a brush.

Sprinkle paprika, coarse sea salt, garlic powder, seasoning salt, and ground black pepper over the oiled onion slices.

Bake in the preheated oven for 25-30 minutes until golden brown and crisp, monitoring closely.

Allow the chips to cool for about 10 minutes before breaking them into bite-sized pieces.