Questions & Answers about Hoy preparé pan con harina de avena para el desayuno.
Both are past tenses, but they focus on different things.
Preparé is preterite: it presents the action as a single, completed event.
- Hoy preparé pan… = Today I made bread (I started, finished – it’s a done event).
Preparaba is imperfect: it presents the action as ongoing, repeated, or giving background.
In your sentence, you’re just reporting a finished action that happened once today, so preparé is the natural choice.
You can, and it is grammatically correct, but it sounds more natural in Spain than in most of Latin America.
In Spain, people often use he preparado (present perfect) with time expressions like hoy:
- Hoy he preparado pan.
In Latin America, the preterite is usually preferred with hoy:
- Hoy preparé pan.
So for Latin American Spanish, Hoy preparé pan… is more typical and idiomatic than Hoy he preparado pan….