The following information about food combining is from Frederic Patenuade's raw food newsletter. I found the information very helpful, and I hope you find it helpful, as well…

Food Combining Simplified:

In my book, “The Raw Secrets,” I have simplified food combining to a few simple rules. Let’s take a look at those rules again…

1.) DO NOT COMBINE FAT WITH SUGAR

This is probably the most important rule to follow. The combination of fat (or protein) with sugar encourages fermentation. Some authors allow combining an acid fruit (such as an orange) with a fat (such as nuts or avocado). Although this combination isn’t the worst, it still isn’t
optimal and often creates digestive problems.

Examples of this combination: dates with nuts, dried fruits with avocado, avocado with sweet fruits, a fruit salad with coconut, etc.

2.) DO NOT COMBINE ACID FOODS WITH STARCH

Acid with starch is a pretty bad combination. The acidity literally stops the digestion of starches, or makes it much more difficult (and sometimes painful).

Examples of this combination: mixing tomatoes with (cooked) potatoes, the classic tomato-sandwich, but also mixing bananas with oranges. Oranges contain much acidity and bananas still contain starch, even when they are ripe. Bananas combine better with fruits that contain less acidity (sweet apples, mangoes, etc.).

3.) DO NOT COMBINE DIFFERENT TYPES OF FATTY FOODS WITHIN ONE MEAL

Fatty foods are quite difficult to digest. When many of them are present within a meal, digestion is considerably slower.

Examples of this combination: nuts with avocados, nuts with an oil, coconut with avocado, coconut with other types of nuts, etc.

That’s it! Those are the rules when eating a raw/hygienic diet. Of course, we could come up with more rules, but they would be for combinations that wouldn’t be appealing. For example, I doubt that fibrous vegetables (such as broccoli) would mix well with fruits (mangoes, etc.), but this combination is naturally unappealing, so it’s useless to discuss it."