Final answer:
The word 'brainstorm' in the excerpt means to generate ideas or think creatively.
Step-by-step explanation:
The context clue that could help you determine the meaning of the bold word 'brainstorm' in the excerpt is 'Example.' In this context, 'brainstorm' means to generate ideas or think creatively. The clue 'Example' suggests that Aunt Lou is thinking of different food experiments she could create, indicating that she is brainstorming.