noun
BAD : I usually have a cup of coffee and a toast for breakfast.
GOOD : I usually have a cup of coffee and some toast for breakfast.
BAD : You make some toasts and I'll set the table.
GOOD : You make some toast and I'll set the table.
◆◆◆
Toast is an uncountable noun: 'There's some toast for you in the kitchen.' 'How many pieces/slices of toast would you like?'