How much (a)   the mustard? (is/are)

How much (a)   the tomatoes? (is/are)

How much (a)   the eggs? (is/are)

How much (a)   the mayonnaise? (is/are)

How much (a)   the red onions? (is/are)

How much (a)   the black olives? (is/are)

How much (a)   the bread? (is/are)

How much (a)   the green peppers? (is/are)

How much (a)   the turkey? (is/are)

How much (a)   the apples? (is/are)

How much (a)   the chocolate? (is/are)