Preparation. Preheat oven to °. Place seeds in a bowl and fill with water; swish seeds around; strain. Rinse and drain. Toss seeds with lime or lemon juice, . These pumpkinseeds make a delicious snack that delivers a slight sweetness with a kick thanks to the chipotle chili powder and red pepper. Oct 9, These Spicy Toasted Pumpkins Seeds are a tasty and healthy way to use those leftover pumpkin seeds, not to mention easy too.