Increasing carbs

I want to get to 400g of carbs on lifting days but I just can't see how people do it without eating shite foods. Currently I put my eggs on a sandwich in the morning and have some Oatmeal, usually have some white rice and veggies with lunch and dinner, and a baked potato before I lift. I snack on things like beef jerky or oranges most days which adds a bit but not much. I'm usually topping out at about 300g a day. I hate buying a lot of fruits because they don't last very long so I end up eating them all in 3 days and not having any until I go back to the store. I also don't handle dairy too well so I keep that low. What are some of your favorite ways to add carbs to your meals?