Wash potatoes, and let dry.

Cut potatoes in same size, halves or quarters. Place on cookie sheet.(pre heat oven 425)

Cut onion into large wedges, place on cookie sheet

Drizzle potatoes and onions with olive oil, then add mustard, use hands to toss all potatoes and onions, until everything is coated. Spread them out in a single layer.

Wash hands lol, sprinkle with salt and pepper, bake for 50 mins to 1 hr, set a timer 20 mins and toss with a spatula, toss every 20 mins. So they don’t stick to pan and potatoes don’t burn.

Notes- use whatever potatoes you have.