How to freeze pesto<br>Scoop your pesto into an ice cube tray using a spoon. Fill each cell in the ice cube tray evenly. Don't put so much pesto in that the cells overflow into each other.
you can fill an empty ice cube tray with food and freeze it
"How to Freeze Pesto: scoop your pesto (food) into an ice cube tray."                                                             Pesto is "food" and it is to be frozen in an ice cube tray. so according this context, you can freeze pesto in empty ice cube tray's. So this statement is "definitely correct".
( z1 possible :ARG1 ( z2 and :op ( z3 fill :ARG0 ( z4 you ) :ARG1 ( z5 tray :cxnsistof ( z6 ice-cube ) :ARG1-of ( z7 empty ) ) :ARG2 ( z8 food ) ) :op ( z9 freeze :ARG0 z4 :ARG1 z6 ) ) )