Equal parts of diced onions and diced bell peppers are known as what?

The correct choice refers to a standard combination of diced onions and bell peppers commonly used in cooking. This specific mix is particularly known as the Denver Mix, which is a popular preparation in many recipes, especially for breakfast dishes like omelets and scrambles. The term is typically associated with this particular blend of vegetables, highlighting its use in various culinary contexts, especially within American cuisine.

In contrast, other terms mentioned do not specifically denote this combination. A Vegetable Medley generally refers to a mix of various vegetables, and could encompass a wide variety of ingredients beyond onions and bell peppers. Oven Blend often indicates a combination of vegetables suitable for roasting but does not specifically refer to the onion and bell pepper mix. Culinary Mix is a broader term that could imply any mixture of culinary ingredients without reference to any specific vegetables. Thus, the Denver Mix is the most accurate term for equal parts of diced onions and diced bell peppers.