Apple sauce is terribly easy to make, and its nice to throw in some random fruit to see how well it mixes, especially when berry/fruit harvest is starting. The whole process took me about 15-20 mns
1 bunch of rhubarb chopped (gave me about 3 cups or so)
about 1 cup each of strawberries and raspberries
2 McIntosh apples, peeled and chopped (some people keep the peel but i don't like it)
1 orange, grated and juiced.
Cook the apples with a splash of water for about 5 mns in a big saucepan (medium heat), then add the rhubarb and simmer for another couple of minutes until there is more liquid in the saucepan. Add the remaining ingredients and continue to simmer until the fruit is tender and cooked through, then give it a whirl with a food processor (or I used a hand blender) until desired consistency. This gave me 4 x 250ml jars with a bit extra. Some of those are going as gifts and the rest is being used to mix with my yogurt in the morning, and to be used in place of oil in recipes (making some bran/oat/honey muffins with the applesauce, going to be delicious!).
Note: I didn't add any sugar because I didn't want any in there, the result was a tart sauce. If you want/need some sugar, add it in at the same time as the strawberries.