grilled cheese sandwich
US /ˌɡrɪld ˈtʃiːz ˌsæn.wɪdʒ/
UK /ˌɡrɪld ˈtʃiːz ˌsæn.wɪdʒ/

1.
a sandwich made with cheese between slices of bread, often buttered, and then grilled or toasted until the bread is crispy and the cheese is melted
:
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For lunch, I often make a simple grilled cheese sandwich.
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Nothing beats a warm, gooey grilled cheese sandwich on a cold day.