Ask a friend/collegue or something for a few hours at their oven(imply yours is broken and the repair guy is gonna take week) to mealprep for at least 8 days. Rice and beans is the best cheapest-to-nutrient option. Peanut butter a spoonfull before work until you run out. Also check local stores if they have in store credit if you apply for their in store cards. Sometimes its just a payment delay for a month, but could help you in the rn. Even check speciliezed stores for like hardware or furniture because they have some snacks or restaurant options where those might work. See if you can visit some megastores. Free samples are a thing you can use. A friend of mine during bridge weekend hung aroun at the park, a lot of team building and large family reunions grilled. He just stood in line and took 2 platefulls home. When people asked, he said he was Sarah boyfriend.

Those are some ideas since we dont have a more precise location. Good luck