Possible Clues:

• Spooner's had no alcohol for a meal
• Meal eaten at work
• Meal that, for Spooner, needed something alcoholic
• Spooner's had little bite in food prepared for excursion, perhaps
• Meal had no impact? First items should be switched
• Provisions for picnic? Spooner's didn't include spicy drink
• After swapping starters, didn't bite sandwiches?
• Fare in container producing sign of overeating around fancy deck by lake
• Switching starters, went without alcoholic drink in meal at midday?
• Ready-prepared midday meal in container