I steam my onions and squash together in a wire steamer over water on medium high heat. I’ll steam the onions and squash for 15 minutes.
While that steams, I open my can of corn, and drain it in a seive. Leave it in the seive.
Once the onions and squash are tender, I’ll drain them over the corn (so it cooks slightly and heats through.) I let these drain for a good 15 minutes, mashing a bit to get any residual water content out.
In a large bowl, I’ll dump the corn, onions, and squash.
Then measure out 1/2 tablespoon of house seasoning, and 1 tsp of cumin.
Mix around to evenly distribute the seasoning.
Add in the shredded cheese and give it another mix.
Turn out into a buttered casserole dish, then top with the dressing and melted butter.