Here is a list with links to the research-based recommendations that have been shared on this blog (alphabetical by main ingredient):

APPLES

Apple Butter (and no-sugar added apple butter)

Apple Chutney

Apple Jelly

Apple Juice

Apple-Pear Jam

Apple Marmalade

Apple Spread (refrigerated)

Spiced Apple Rings

Dried Apple Slices/Rings

Frozen Apple Slices

Applesauce

Spiced Crabapples

Crabapple Jelly

ASPARAGUS

Pickled Asparagus

BEANS/PEAS

Beans or Peas

Baked Beans

Beans with Tomato or Molasses Sauce

Canning (Dried) Black Eyed Peas

CANTALOUPE

Cantaloupe Pickles (and No-Sugar Added Cantaloupe Pickles)

CITRUS

Citrus Marmalade

Orange Jelly (from Frozen Juice)

CHERRIES

Cherry Jam

Cherry Jelly

Sour Cherries

Sweet Cherries

Sweet Cherry Topping

Cherry Syrup

Dried Cherries

Freezing Cherries

CORN

Pickled Corn Relish

Canning Corn

Cream-Style Corn

Drying Popcorn

Freezing Corn

CRANBERRIES

Cranberry Conserve

Cranberry Orange Chutney

Cranberry Marmalade

Spicy Cranberry Salsa (in Spanish)

Cranberry Sauce

CUCUMBERS

Bread-and-Butter Pickles

Fresh Dill Cucumber Relish

FIGS

Fig Jam

Fig Pickles

Fig Preserves

Freezing Figs

GRAPES

Grape Spread (refrigerated)

HORSERADISH

Pickled Horseradish Sauce

JICAMA

Bread-and-Butter Pickled Jicama

LEMONS

Lemon Curd (canned)

Lemon Curd (frozen)

MEAT

Festive Mincemeat Pie Filling

Chili Con Carne

NUTS

Freezing Chestnuts, Peanuts, and Pecans

OKRA

Pickled Dilled Okra

PEACHES

Peach-Orange Marmalade

Peach-Pineapple Spread

PEPPERS

Hot Pepper Relish

PUMPKIN

Cubed Pumpkin

Spicy Pumpkin Leather

Frozen Pumpkin

RHUBARB

Rhubarb (Canning and Freezing)

SPINACH

Canning Spinach and Other Greens

SQUASH

Squash Pickles

Freezing Summer Squash

STRAWBERRIES

Strawberry-Fig Preserves

Strawberry-Kiwi Jam

TOMATOES (GREEN)

Pickled Sweet Green Tomatoes

Kosher Style Dill Green Tomato Pickles

Spiced Green Tomatoes

Fall Garden Relish

Piccalilli

Pickled Green Tomato Relish

Rummage Relish

TOMATOES

Tomato Marmalade

Salsa

Choice Salsa

Spaghetti Sauce (with meat)

Spaghetti Sauce (without meat)

Hot Sauce

Blender Ketchup

Country Western Ketchup

Tomato Ketchup

Crushed Tomatoes

Whole or Halved Tomatoes

Tomato Juice

Tomato-Vegetable Juice

Tomato Sauce

VEGETABLES (MIXED)

Soup (Canning)

Soup (Freezing)

Mixed Vegetables

VENISON

Cured/Smoked Venison

Venison

Venison Jerky

Venison Sausage

WATERMELON

Watermelon Rind Pickles