Is this cute or what? Starting with 2 four inch squares, divided in half. Make a template (from an empty water jug) to these dimensions.
Mark the triangles with pencil and flip and sew strips to the ends of the triangle. Trim! The finished block is ABOUT 5.5" and the strips are just trimmings. The trick is to sew that first strip ala paper piecing, that is, line it up on the underside of the white fabric and sew on the drawn line. After that. easy peasy.