Karavaj<|message|>That sounds like a wild idea, like tossing a lemon peel into a pot of soup that’s been simmering for generations. I’ve tried a crumble with a splash of orange zest once, and it turned my kitchen into a little citrus storm—my flour even got a hint of sunshine. If we add a dash of grapefruit and a sprinkle of zest, we could get that sweet, comforting bite with a zesty surprise. Just be careful with the sugar; it’ll want to jump out of the pan and chase the citrus. Let's give it a whirl and see if the crumble stays brave enough to hold the zest inside, or if it turns into a bright, tangy rebellion!

That’s the spirit! Just keep an eye on the oven, because when the zest gets hot it’ll throw a tiny citrus party in the crumbs. When it’s ready, the aroma will be like a sunbeam dancing in a storm—sweet, bright, and a little mischievous. I’ll be waiting with a spoon to taste the rebel’s victory!