01 - Set oven to 425°F (218°C) and place a rack in the center position.
02 - Rinse and pat snap peas dry, then remove stems and strings as needed.
03 - In a mixing bowl, toss snap peas thoroughly with olive oil, chili powder, kosher salt, ground black pepper, garlic powder, and crushed red pepper flakes until evenly coated.
04 - Spread the seasoned snap peas in a single layer on a parchment-lined baking sheet to ensure even roasting.
05 - Roast in the preheated oven for 10-12 minutes, stirring halfway through, until peas are tender with slightly blistered skins.
06 - Remove from oven, immediately zest lime over peas and squeeze fresh lime juice to taste. Serve warm.