How to add a title in the table of contents slide in r markdown Beamer

Question

In R Markdown Beamer, I included a Table of Contents (TOC) via this command:

output: 
  beamer_presentation: 
    toc: true
    slide_level: 2

I need a way to make a title for the slide of TOC (and in Portuguese). I have seen some answered questions, but they were not for Beamer.

Answer 1

You could manually insert the toc, then you have full control of the frametitle:

---
output: 
  beamer_presentation: 
    slide_level: 2
    keep_tex: true

---

## outline
\tableofcontents[hideallsubsections]

# sec 1

# sec 2