I made a side dish using meat that was on sale at my (local) supermarket.
I made side dishes from meat that was discounted at the supermarket.
スーパー - Supermarket
割引 - on sale, discounted, reduced price
お肉 - Meat
で - using, from
おかず - side dish
作る - to make
食べる - to eat
「スーパーの割引のお肉でおかず作って食べた」は英語で I made a side dish using meat that was on sale at my (local) supermarket. 複数形の場合は I made (a couple of) side dishes from meat that was discounted at the supermarketになります。
「食べた」はいらないと思います。I made and ate side dishes that were made from meat that was on sale at the supermarket はやや不自然だと思います。
I made a side dish with the meat I got on sale at the super market.
I bought some meat that was reduced at the grocery store and I cooked a side dish with it.
ーI made a side dish with the meat I got on sale at the super market.
「スーパーでセールで買ったお肉でおかずを作った。」
make a side dish で「おかずを作る」
the meat I got on sale で「セールで買ったお肉」と言えます。
super market 「スーパー」
ーI bought some meat that was reduced at the grocery store and I cooked a side dish with it.
「スーパーで値引きされていたお肉を買って、それでおかずを作った。」
meat that was reduced で「値引きされたお肉」
grocery store で「食料品店・スーパー」
cook a side dish で「おかずを作る」
ご参考まで!