You've already got some great ideas/alternatives here, but I'll put in my 2 cents anyway

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2 large potatoes, peeled and finely chopped (3 cups)
1 medium onion, finely chopped Personally I'd reduce that a lot or take it out completely and replace with onion powder, but my tolerance for the acidity (?) of onions is really low
1 cup diced cooked ham replace with chicken (or fish) - or leave out all together
3/4 teaspoon salt
1/4 teaspoon crushed dried chile pequins or red peppers
2 tablespoons cooking oil it seems this is just for sauteeing, so I'd just use Pam, like you said. You can get flavoured ones (like butter or olive oil), so that might help a little with the flavour, but not sure
6 beaten eggs 12 beaten egg whites (though I see what you mean about it becoming kind of omlette-y)
1/3 cup milk soy or rice milk
1/2 teaspoon salt
1/8 teaspoon pepper

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