Find recipes for Microwave Acorn Squash and other Course recipes. Get all the best recipes at . Recipe directions: Place squash on a microwave-safe plate, microwave on high for 3-4 minutes. Cut in half; remove seeds and strings. Cut a thin slice from bottom of squash with a sharp knife to allow it to sit flat. Place squash, cut side down on in a microwave-safe dish. Cover and microwave for 4-1/2 minutes.