This last weekend my mother-in-law put green salad on top of cold udon noodles and called it salada udon. Today I did the same with hiyashi chuuka.
On top: lettuce cut into ribbons (for ease of eating), cherry tomato quarters, green pepper slivers, soy sauce flavored sesame seeds and ground flax seeds. The dressing was the sauce included with the noodles.
*I recommend cutting everything to a size that is easy to eat when clumped together with noodles. I.e. ribbons, slivers and match sticks.