Thai Curry with tofu

4 teaspoons canola oil divided 14 ounces tofu 1 package, extra-firm, rinsed, patted dry and cut into 1-inch cubes 1 pound sweet potatoes, or yams cut into[...]

1 tablespoon vegetable oil 3 tablespoons Thai red curry paste 2 cups snap peas, trimmed and cut in half on the diagonal 2 large shallots , thinly sliced[...]