Was 12-22 in the 90s. My parents have always been advocates of cooking from scratch so we never really did processed food. Day-to-day, our meals weren't too different from now - quite a lot of pasta and curries as well as shepherd pie and general meat and two veg dishes (lamb chops seemed to feature a lot) - I eat far more veggie dishes now. Every meal back then came with meat or fish as a component and definitely no pulses.
Caeser salads became a big thing in the 90s, both to have in a restaurant and at home. At least one night per week would be a prepared Ceaser salad (bag of lettuce which came with dressing, croutons and parmesan shavings) to which we would add chicken or salmon.
Tex Mex was also huge in the 90s. I must have eaten so many tortilla chips, guacamole and burritos in that decade. I remember the excitement of getting Old El Paso kits at home too and making chilli with crunchy tacos. Lots of other American-themed food too - jambalya, cajun-spiced everything, blackened everything...
I remember pesto arriving from nowhere and being a huge deal. Mum bought a couple of jars from the supermarket and seeing that the serving suggestions included potatoes, loaded up some baked potatoes by pretty much emptying a full jar on the top of each. We thought it was disgusting and binned it. Not long after that though, I was with friends who go really excited about ready made pasta salad pots with pesto and pine nuts in the supermarket. I didn't want to seem like a luddite next to them so I bought one too and thought it was amazing. Persuaded mum to give pesto another try after that. I think though, the concept of having a relatively dry pasta which was just coated with pesto, or any type of sauce, was completely alien. Until that point our pasta dishes had been a 70/30 ratio in favour of sauce.
I think one of the biggest changes is that foodstuffs which were posh then, have now become commonplace. Pesto is an example, feta another, and also creme-fraiche. I remember Delia suggesting stirring creme-fraiche through mashed potato and it was life changing. Similarly, mixing it with some lemon juice and serving on the side of a salmon fillet with a few snipped chives - this was the epitome of poshness.
There was also a lot of strange recipes happening in the name of diet and health. Mum would make Thai curries, for example, but coconut milk was a huge no-no so she would mix skimmed milk with a spoonful of malibu. Avocados, bananas and nuts were also out due to fat content.