Preheat Oven:
Preheat oven to 300°F (150°C). Line a baking sheet with foil and set a wire rack on top.
Season Ribs:
Pat lamb ribs dry. Rub with olive oil, then season with salt, pepper, garlic powder, and smoked paprika. Place on the rack, meaty side up.
Bake Low and Slow:
Cover ribs with foil and bake for 1 hour 30 minutes, until tender.
Make the Glaze:
In a small saucepan, combine brown sugar, garlic, soy sauce, Dijon, vinegar, Worcestershire, ketchup, and red pepper flakes. Simmer over low heat for 5–7 minutes until slightly thickened.
Glaze and Roast:
Remove ribs from oven. Increase temperature to 425°F (220°C). Brush ribs generously with glaze and return to oven, uncovered, for 15–20 minutes, basting once more halfway through, until the glaze is bubbly and caramelized.
Rest and Serve:
Let ribs rest 5 minutes before slicing. Serve with extra glaze on the side, if desired.