Broccoli you may want to slightly steam, then either clamp to the side of the wall or cut up into strips or tiny pieces.
Here's a great site on the nutrition information on foods of any type (including fast foods)
NutritionData.com NutritionData's Nutrition Facts Calorie Counter
Here's a list of foods that can be fed (although not complete) from the Healthy Bird Cookbook by Robin Deutsch.
Grains, Breads, and Muffins
Corn bread
Graham crackers
Mandel bread, soaked
Matzoh
Matzoh balls
Mini bagels
Oatmeal
Pastas
Rice
Rice cakes
Rice Chex
Rice Krispies
Sweetened corn cereals
Sweetened oat cereals
Toasted bread
Unsalted crackers
Unsalted, unbuttered popcorn
Wheat cereals
Whole-wheat or multigrained bread
Zweibach toast, soaked
Other grains
Vegetables
Beans
Beets
Broccoli
Carrots
Corn
Green beans
Jalapeno peppers
Lima beans
Mixed vegetables
Okra
Peas
Potatoes
Summer squash
Sweet Potatoes
Winter squash
Yams
Fruit
Apples
Bananas
Berries (all kind)
Grapes
Kiwis
Mangos
Melons
Oranges
Papaya
Pears
Star Fruit
Winter Squash
Yams
Other Foods
Hulled seeds
Millet spray
Monkey biscuits
Peanut butter sandwiches rolled in millet
Pellets
Scrambled eggs
Hard-boiled eggs
Sprouted seeds
Foods to avoid
Chocolate
Avocados
Sugar (too much is a bad thing... best kind is natural sugars)
Old Seeds
Mayonnaise products
Unwashed Fruits or Vegetables
Rhubarb (contains oxalic acid, as does spinach - feed only in small amounts)
Fruit Pits
Nuts (brazil nuts, almonds, imported nuts that have been polished/dyed)
Dairy Products (birds are lactose intolerent-feed small amounts-cleaned/cooked eggs and yogurt fine)
Mold
Caffeine
Salt
Alcohol
Food Dyes
Sulfites (found in dried fruits and veggies to help preserve them-only from health food store)