At 7 months, I would continue to introduce fruits and vegetables (one by one, to ensure your baby doesn't have any allergic reactions). I would suggest the following:
Just check out the baby food aisle in your local grocery store, and look for foods that have the "first stages" label. If you are making your own baby food, continue with pureeing fruits and veggies yourself. If you're looking to vary it up for your baby, you can try different combinations of age appropriate foods.
It's too early to introduce dairy or meats, so just keep doing what you are doing, and continue with the fruits and veggies.
Good luck to you!