This Recipe is meant for Boy Scouts.
Decide for yourself if it is appropriate for your younger scouts or not.

1 medium Tri Tip steak
1 can pineapple and juice
1 cup brown sugar
1 cup minced garlic
2 cups teriyaki sauce

main course

Put all ingredients except steak in a large zip-loc bag and mix it together well.
Add the steak and let it marinate overnight in a cooler or fridge.

Dump all the contents of the bag into a dutch oven preheated to 325 degrees. Cook for one hour - less time if you like it more rare.

Servings depend on the size of steak - about 1/4lb per scout.