In a large bowl (the bowl you intend to serve this salad in), soak bulgur in a mixture of 1 c. water, 1/4 c. lemon juice, and 1/4 tsp. salt. Cover and let sit for about 90 minutes, or until bulgur has softened and become chewy and no liquid remains.
Meanwhile, make the dressing: in a measuring cup, combine 1 Tbsp. lemon juice, olive oil, cumin, cayenne powder, and 1/4 tsp. salt.
When all liquid has been absorbed in the bulgur, pour dressing over the grains and toss to combine. Add feta, almonds, grapes, green onions, and mint and toss again. Season with salt and pepper to taste. Serve immediately or refrigerate.