Arquivo "food_menu.dart" -

import 'package:flutter/widgets.dart';
import 'package:panucci_ristorante/components/food_item.dart';
import 'package:panucci_ristorante/cardapio.dart';

class Menu extends StatelessWidget {
  const Menu({super.key});

  final List items = comidas;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.fromLTRB(16, 16, 16, 0),
      child: CustomScrollView(
        slivers: [
          const SliverToBoxAdapter(
            child: Padding(
              padding: EdgeInsets.only(bottom: 16.0),
              child: Text(
                textAlign: TextAlign.center,
                'Menu',
                style: TextStyle(
                  fontFamily: "Caveat",
                  fontSize: 32,
                ),
              ),
            ),
          ),
          SliverList(
            delegate: SliverChildBuilderDelegate(
              (context, index) {
                return FoodItem(
                    itemTitle: items[index]['name'],
                    itemPrice: items[index]['price'],
                    imageURI: items[index]['image']);
              },
              childCount: items.length,
            ),
          )
        ],
      ),
    );
  }
}

No arquivo "food_item.dart" só adicionei width: 80 e height: 80