I'm with you on the mushrooms, they grow on dead things for crying out loud.
However, fried tomatoes are OK, as long as you're using olive oil to fry in.
And I gently fry my baked beans every morning to get a nice thick goo. After years of testing (yum), I've come to the conclusion Tesco beans are best value for money & taste. I dabbled with Branston ones for awhile, but they were too salty to eat daily.
Sausages should always have 85%+ pork content, that's why I avoid them when staying in most hotels....