In sub-tropical and tropical areas, chillies are perennial, but in temperate zones they behave as annuals. If you are in a temperate zone that is frost-free, the plants may die back and re-shoot in spring, but it is better to start afresh from seed.

if it becomes molded

They use a machine.

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One can make homemade pimento cheese by opening a jar of pimentos, and draining the juice, pour the shredded cheese in to the bowl and add the drained pimentos, add one cup of mayonnaise and mix it together. This is the easiest way to make homemade pimento cheese.

It is a green bell pepper that is left in the sun to ripen & turns red.

Roast poblano peppers on an open flame til charred about 80%. "steam" or sweat them in a plastic bag for 10 - 20 minutes and then the waxy skins will scrape off under cool water. Cut the tops off, slice down the middle and remove the seeds. Now these can be frozen in ziploc freezer bags or canned with a pressure canner.

They don't make cheese with mayonnaise

You can use either pimentos or pimento as the plural.