Place the sugar snap peas onto a large baking sheet, drizzle the oil, and season with salt, pepper, and garlic powder.: The scent of dry pods meeting warm oil is subtle at first, but once the oven heat hits them the kitchen starts to smell slightly sweet and toasty. Spread the peas across the sheet so each one gets direct contact with the metal, that contact is what creates those small browned spots and the satisfying crisp texture. One common mistake is piling them in layers, which causes steaming rather than roasting so they remain limp. If peas are wet, pat them dry before oiling, because moisture prevents proper browning and leads to a soft, steamed finish. Visually you want a single layer with gaps so hot air circulates freely.
Mix everything well and spread evenly. Bake at 450 F for 15 minutes.: You will notice a light sheen of olive oil coating each pod, and this is exactly what helps the surface darken and develop flavor. The herbs and spices should cling evenly, which helps every bite carry a balanced taste. When you toss, do so gently to avoid bruising the peas, but thoroughly enough that no area of the sheet has a clump of seasoning or oil. A typical error here is using too much oil, which yields greasy edges instead of crisped blistering. The right touch gives you slight caramelization and a roasted aroma as the sugar in the pods begins to concentrate.
Bake at 450 F for 15 minutes: The heat will greet the peas with an immediate searing sensation at contact points, producing tiny brown flecks and a roasted perfume that is part toasty, part vegetal sweet. Listen for a faint crackle as moisture leaves the pods, and watch for the edges to take on golden brown spots while the peas retain their bright green hue. This temperature gives you fast caramelization without overcooking the center. A common pitfall is using a lower oven temperature, which can lead to longer cook times and a blanched, mushier result. Keep an eye near the end so the peas do not become overly browned or dry; they should be blistered but still tender crisp.
