1 small yellow bell pepper cut into 1/4-inch strips
2 scallions thinly sliced
In a medium pot of boiling salted water, cook spaghetti until al dente, according to package instructions. Drain; return to pot.
Meanwhile, in a medium bowl, whisk together marmalade, soy sauce, oil, vinegar, and ginger. Season with salt and pepper. Add shrimp, bell pepper, and scallions; toss to combine. Transfer to a rimmed (or toaster-oven) baking sheet, and spread in a single layer.
Heat broiler (or toaster oven). Broil, 4 inches from heat source, until shrimp are opaque throughout, about 3 minutes. Transfer contents of baking sheet to pot; toss with pasta to combine.