Quarter the potatoes and then cut into 1/2" slices. Parboil until fork tender. As soon as you can poke into the potato with a fork it is done. Drain and set aside.
Melt butter in a 12" skillet. Add olive oil. Add potatoes. Pan fry, flipping every three to four minutes until they are crispy and brown. You might need to add more butter during this time.
Add garlic, onion, broccoli and bell pepper. Cook another five minutes until veggies are slightly soft.