12 ounces dried flat rice noodles (1/4 inch wide; sometimes called pad Thai or banh pho)
3 tablespoons tamarind (from a pliable block)
1 cup boiling-hot water
1/2 cup light soy sauce
1/4 cup packed light brown sugar
2 tablespoons Sriracha (Southeast Asian chile sauce)
1 bunch scallions
4 large shallots
1 (14- to 16-ounce) package firm tofu
1 1/2 cups peanut or vegetable oil
6 large eggs
4 garlic cloves, finely chopped
2 cups bean sprouts (1/4 pound)
1/2 cup roasted peanuts, coarsely chopped
Accompaniments: lime wedges; cilantro sprigs; Sriracha