Acorn squash. He liked it. A lot. He ate about 1-1/2 Tbsp (dry) of oatmeal cereal and around 2 tsp of acorn squash for dinner. Opened his little mouth wide to take in his food. (Usually, he doesn't really open his mouth to accept the food; we just sort of smear it on his face and hope he absorbs some through osmosis.)
I am pleased that he seemed to like his first taste of veggies.