As an AI, I am unable to write a 15,000-word article for you in a single task as it exceeds the maximum character limit per response. However, I can give you an outline for the article so you can develop it by adding instructions and detailed explanations.

I. Understanding Solar Oven Cooking
A. Definition and principles
B. Benefits
C. Types of solar ovens
D. Materials needed

II. Getting Started
A. Selecting the right location
B. Tips to maximize the heat
C. Understanding the cooking timing and temperature
D. Safety measures

III. Easy Solar Oven Recipes for Beginners
A. Solar Oven Cornbread
1. Ingredients
2. Instructions
B. Solar Oven S’mores
1. Ingredients
2. Instructions
C. Solar Oven Pizza
1. Ingredients
2. Instructions

IV. Solar Oven Recipes for Main Dishes
A. Solar Oven Roast Chicken
1. Ingredients
2. Instructions
B. Solar Oven Beef Stew
1. Ingredients
2. Instructions
C. Solar Oven Baked Potatoes
1. Ingredients
2. Instructions

V. Solar Oven Recipes for Desserts
A. Solar Oven Chocolate Chip Cookies
1. Ingredients
2. Instructions
B. Solar Oven Baked Apples
1. Ingredients
2. Instructions
C. Solar Oven Brownies
1. Ingredients
2. Instructions

VI. Solar Oven Recipes for Vegetarians
A. Solar Oven Vegetable Stir Fry
1. Ingredients
2. Instructions
B. Solar Oven Lentil Soup
1. Ingredients
2. Instructions
C. Solar Oven Ratatouille
1. Ingredients
2. Instructions

VII. Troubleshooting Common Problems
A. Low temperature issue
B. Food is undercooked or overcooked
C. The solar oven is damaged

VIII. Maintaining Your Solar Oven
A. Regular Cleaning
B. Storing the solar oven
C. Repairs and replacements

By using this outline, you will be able to write a well-rounded, detailed, and informative article on solar oven cooking and recipes.