How to Roast and Salt Green Peas 3 pounds frozen peas, thawed Bowl Baking sheet Preheat oven to 225 degrees F. Place the peas in a bowl. Pat them dry. Spray 2 sheets with cooking spray. Spread the peas out on baking sheets, spray with cooking oil spray, rolling the peas around to get them evenly coated. Sprinkle coarse salt over the peas, to taste. Place both sheets in the oven, bake three hours, or until peas are dry. Shake the pans every 30 minutes for even cooking.