Separate crescent roll dough into eight rectangles. press seams to seal. Combine cheese and onions; spoon about 3 rounded tablespoonsfuls lengthwise down the center of each rectangle to within 1/4 inch of each end. Fold dough in half lengthwise and firmly press edges together to form a seal. Twist each strip 4-5 times then bring ends together to form a ring. Pinch to seal. Place on a greased baking sheet.
In a small bowl, beat egg and water. Brush over dough. Combine the sesame seeds, garlic salt and parsley and sprinkle over rings.
Bake at 375° for 14-16 minutes or until golden brown. Remove to wire racks. Serve warm.